Add 90/21 and 81/7
1st number: 4 6/21, 2nd number: 11 4/7
90/21 + 81/7 is 111/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 7 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 21 × 1 = 21,
90/21 = 90 × 1/21 × 1 = 90/21 - Likewise, for the 2nd fraction, since 7 × 3 = 21,
81/7 = 81 × 3/7 × 3 = 243/21 - Add the two like fractions:
90/21 + 243/21 = 90 + 243/21 = 333/21 - 333/21 simplified gives 111/7
- So, 90/21 + 81/7 = 111/7
In mixed form: 156/7
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